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We present some unexpected examples related to the Kobayashi pseudodistance: For an unramified covering, the vanishing of the Kobayashi pseudodistance on the base does not imply the vanishing on the total space. The vanishing of the…

Complex Variables · Mathematics 2022-10-11 Joerg Winkelmann

We show that non-elementary random walks on word hyperbolic groups with finite first moment are not noise sensitive in a strong sense for small noise parameters.

Probability · Mathematics 2023-07-25 Ryokichi Tanaka

We study the (Ahlfors regular) conformal dimension of the boundary at infinity of Gromov hyperbolic groups which split over elementary subgroups. If such a group is not virtually free, we show that the conformal dimension is equal to the…

Metric Geometry · Mathematics 2022-08-23 Matias Carrasco , John M. Mackay

In this paper we give a characterization of the Gromov hyperbolicity of trains (a large class of Denjoy domains which contains the flute surfaces) in terms of the behavior of a real function. This function describes somehow the distances…

Complex Variables · Mathematics 2008-06-03 Ana Portilla , Jose M. Rodriguez , Eva Touris

In this article, we prove that there does not exist a family of entire curves in the universal family of hypersurfaces of degree $d\geq 2n$ in the complex projective space ${\mathbb P}^n$. This can be seen as a weak version of the Kobayashi…

Algebraic Geometry · Mathematics 2007-05-23 Olivier Debarre , Gianluca Pacienza , Mihai Paun

We prove that a strongly pseudoconvex domain with noncompact group of Kobayashi/Royden metric isometries must be biholomorphic to the unit ball.

Complex Variables · Mathematics 2008-05-01 Kang-Tae Kim , Steven G. Krantz

We study the boundaries of non-univalent simply connected Baker domains of transcendental maps (both entire and meromorphic), of hyperbolic and simply parabolic type. We prove non-ergodicity and non-recurrence for the boundary map, and…

Dynamical Systems · Mathematics 2024-10-28 Anna Jové

In this note we show that given two complete geodesic Gromov hyperbolic spaces that are roughly isometric and $\varepsilon>0$, either the uniformization of both spaces with parameter $\varepsilon$ results in uniform domains, or else neither…

Metric Geometry · Mathematics 2021-08-26 Jeff Lindquist , Nageswari Shanmugalingam

We study the possible singularities of Miyaoka-Kobayashi curves and prove several results about the non-existence of such curves in degrees $\geq 8$.

Algebraic Geometry · Mathematics 2025-08-25 Alexandru Dimca , Piotr Pokora

The purpose of this paper is to provide a uniformization procedure for Gromov hyperbolic spaces, which need not be geodesic or proper. We prove that the conformal deformation of a Gromov hyperbolic space is a bounded uniform space. Further,…

Metric Geometry · Mathematics 2024-11-05 Vasudevarao Allu , Alan P Jose

We study equivariant Gromov-Hausdorff distances for general continuous actions which are not necessarily isometric as Fukaya introduced. We prove that if an action is expansive and has pseudo-orbit tracing property then it is stable under…

Dynamical Systems · Mathematics 2020-05-12 Nhan-Phu Chung

In this paper, we study certain applications of sphericalization in Gromov hyperbolic metric spaces. We first show that the doubling property regarding two classes of metrics on the Gromov boundary of hyperbolic spaces are coincided. Next,…

Metric Geometry · Mathematics 2020-09-30 Qingshan Zhou , Yaxiang Li , Xining Li

Our goal here is to give a simple proof of the non integrable version of Brody's characterisation theorem.

Complex Variables · Mathematics 2007-05-23 R. Debalme

In the last decade, G. Bharali and A. Zimmer defined a class of domains called Goldilocks domains and they showed that such a domain satisfies a visibility condition with respect to the Kobayashi extremal curves. Inspired by their…

Complex Variables · Mathematics 2024-06-19 Nikolai Nikolov , Ahmed Yekta Ökten

We describe all possibilities of existence of non-elementary proper holomorphic maps between non-hyperbolic Reinhardt domains in $\mathbb C^2$ and the corresponding pairs of domains.

Complex Variables · Mathematics 2012-06-07 L. Kosinski

We study the rigidity of maps between bounded symmetric domains that preserve the Carath\'eodory/Kobayashi distance. We show that such maps are only possible when the rank of the co-domain is at least as great as that of the domain. When…

Complex Variables · Mathematics 2026-03-04 Bas Lemmens , Cormac Walsh

In this paper, we establish the Weinstock inequality for the first non-zero Steklov eigenvalue on star-shaped mean convex domains in hyperbolic space $\mathbb{H}^n$ for $n \geq 4$. In particular, when the domain is convex, our result gives…

Differential Geometry · Mathematics 2024-09-05 Pingxin Gu , Haizhong Li , Yao Wan

We survey some basic results on the Gromov-Prohorov distance between metric measure spaces. (We do not claim any new results.) We give several different definitions and show the equivalence of them. We also show that convergence in the…

Probability · Mathematics 2020-06-03 Svante Janson

We proved that non-elementary discrete convergence groups are acylindrically hyperbolic.

Group Theory · Mathematics 2017-10-23 Bin Sun

We study the effect of a domain wall on the electronic transport in ferromagnetic quantum wires. Due to the transverse confinement, conduction channels arise. In the presence of a domain wall, spin up and spin down electrons in these…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Victor A. Gopar , Dietmar Weinmann , Rodolfo A. Jalabert , Robert L. Stamps